Did anyone think at this? How would a bank work? How could you loan bitcoins and get interest for them in an economy with just 21 milion BTC limit?
i think bitcoin banks do not works as lending institution, maybe it will work best if it will be intended to store you bitcoins and earn interest to add up on your savings. if you will loan bitcoin, since bitcoin is volatile the principal amount could incur interest but hard to compute, unlike when you loan in dollars, the computation of interest is based on the current rate of dollars. and it is fixed.